Fill in the blanks in whole numbers or fractions.
The ratio of adults to children is 9 : 11.
The ratio of girls to boys is 1 : 3.
The number of women to men is 5 : 4.
Let the number of children be 11 u.
- Number of adults = _____ u
- Number of girls = _____ u
- Number of men = _____ u
- Total number of people = _____ u
Adults |
Children |
9 u |
11 u |
Women |
Men |
Girls |
Boys |
5 |
4 |
1 |
3 |
|
49 x 9 u = 4 u |
14 x 11 u = 234 u |
|
(a)
Change ratio into units.
Girls : Boys : Children
1 : 3 : 1 + 3
1 : 3 : 4
Number of adults = 9 u
(b)
Number of children = 11 u
Fraction of the children that were girls =
14 Number of girls
=
14 x 11 u
= 2
34 u
(c)
Number of adults = 9 u
Fraction of the adults that were men =
49 Number of men
=
49 x 9 u
= 4 u
(d)
Total number of people
= 9 u + 11 u
= 20 u
Answer(s): (a) 9; (b) 2
34; (c) 4; (d) 20